Notebook power lowering technical analysis
Energy saving for laptop is crucial, it not only affects the standby time
, large laptop power heat to the notebook cooling design and produce a great life. "Fire" notebook, more will make use of user comfort. Therefore,
TOSHIBA PA3689U-1BRS Laptop Battery in the selection, notebook fittings by "one ticket veto power", even more powerful hardware performance, if exceed the notebook is power. Because of the special demand, the notebook manufacturer spare no effort to launch a variety of energy-saving technology, make the notebook in the performance of ascension, still can maintain power at a lower level.
Energy-saving object: the CPU, graphics and chipset
The CPU, graphics, the three components of the chipset "electricity" for more than half of the notebook, therefore, for their energy research and development history of throughout the notebook. Although they in this notebook playing different roles, but its principle, but there are some similarities, therefore, they also have different energy research.
1 structure, process saving speed
Framework for power will be affected? Just look beyond the Pentium Pentium M the contemporary 4 - M performance and lower Pentium 4 - M power,
Replacement TOSHIBA PA3689U-1BRS Laptop Battery ,you can know for performance and consumption structure. Although the difference between them is caused by many reasons for power, but ignore is the line length, Pentium M Pentium 4 - only about half the M. For example, the Pentium 4 - M long line is hired many workers, so, even if the line every worker's salary (power), low consumption of its total wages (always) also nots allow to ignore. But because of the Pentium M almost half the workers reduced, so, even if each worker's salary (power) was slightly higher, its total wages (always) will also reduce power consumption. Of course, the line length is not the only factor decision structure, such as the power of the Atom, low consumption model to the line more than KuRui series also slightly, but because of its structure, thus greatly simplified per level power lines are very low, it will make the Atom of low power consumption.
Of course,
Battery For TOSHIBA PA3689U-1BRS the process of ascension is also reduce power consumption negligible factor, we see from Banias CPU to move from Penryn, monocytes evolution to dual-core even four nuclear, continuously improve its performance and integration, but the TDP power and not too big change. Among them, the evolution of manufacturing process. When the CPU Banias by the manufacturing process of the 130nm evolution to Penryn 45nm, power consumption greatly reduced. At the same time, high K metal grid and other new technology applications, reduce leakage, and promoted the conductive to reduce power consumption, also have huge contribution.
And the evolution process, the benefit is not only the CPU chip in chipset, graphics, etc, also can see the progress of evolution process. Such as the mobile edition video from AMD X1000 series, each generation performance of ascension is to reduce power consumption, with more than HD3000 series, power X1000 series reduced by 15% to 30%, among them, a large part of the manufacturing process is due to AMD.
2 several, to saving energy and reducing consumption
As we all know, the CPU, the higher the frequency, the work, the higher the voltage power is bigger also. But to cope with low CPU and high load cases of using demand. So, can let the CPU frequency and voltage with load changes and corresponding adjustment, in order to achieve the balance between power and performance? The CPU manufacturer is along the ideas to reach energy-saving purpose.
Intel in the SpeedStep, for example, the first generation technology thinking is very simple, namely, the use of AC power supply, let the CPU in full working conditions, and used in battery, automatic frequency reduction to extend battery life time. After all, SpeedStep to SpeedStep kind to the development, now has been widely used in EIST (notebook to SpeedStep Intel beaver), the SpeedStep Intel Enhanced saving Technology becomes more reasonable. When the CPU at low load detected, not only can reduce the working frequency of CPU, still can reduce voltage, and further the purpose of energy-saving. But once the CPU load increases, the frequency and voltage will be according to the size of the load on stage, this reached the balance between energy and performance.
As the old rivals, AMD Intel also have similar PowerNow technology. But even in mobile display card, also have such techniques, such as using mobile video AMD series of "PowerPlay", "PowerMizer" technology NVIDIA, all depend on the dynamic adjustment of video frequency and voltage to reduce power consumption,.
3. "leave", reduce costs
To ensure the stable operation, fast chip various chip inside is very complex, even integrated billions of a transistor. So, even the static frequency reduction step-down, power also nots allow to ignore, and work on a chip, and not every part of the circuit are needed, for those who work for the circuit, cut off their unused power, allowing them to "leave" is undoubtedly electricity-saving tweak.
Because of this, Intel Atom in Penryn and CPU, in addition to maintain the original C1, C3, C4 C2 / standby mode, and increase the C6 standby mode, in C6 mode, the processor almost completely disabled. Power supply voltage drops to only 0.3 V, and only a fraction of the microprocessor in response to awaken and activities. At this time, even the CPU power is negligible.
Notebook power lowering technical analysis
By: dikkysun
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